Cheyenne's login nodes give users access to the GLADE shared-disk resource and the High Performance Storage System (HPSS). With the introduction of Cheyenne, new data storage components provided by DataDirect Networks (DDN) increased the GLADE system’s total usable capacity from 16 PB to 52.7 PB. The new DDN system transfers data at the rate of 200 GBps, which is more than twice as fast as the older file system’s rate of 90 GBps.

Estimating core-hours needed

Cheyenne allocations are made in core-hours. The recommended method for estimating your resource needs for an allocation request is to perform benchmark runs. The core-hours used for a job are calculated by multiplying the number of processor cores used by the wall-clock duration in hours. Cheyenne core-hour calculations should assume that all jobs will run in the regular queue and that they are charged for use of all 36 cores on each node.